Air purifier



FIG. 1 a front view of an air purifier;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a left side view thereof.

The article is an air purifier, for example, an air detoxifier. The broken lines in the drawings depict portions of the air purifier that form no part of the claimed design. 

CLAIM The ornamental design for an air purifier, as shown and described. 